diff --git a/django/utils/functional.py b/django/utils/functional.py
index 9e1be0fe0f..1da894364d 100644
--- a/django/utils/functional.py
+++ b/django/utils/functional.py
@@ -432,6 +432,11 @@ class SimpleLazyObject(LazyObject):
             return result
         return copy.deepcopy(self._wrapped, memo)
 
+    def __radd__(self, other):
+        if self._wrapped is empty:
+            self._setup()
+        return other + self._wrapped
+
 
 def partition(predicate, values):
     """
